Help with 2 small parts please.... Pic attached as payment!

Hello,
I am over the moon with the results of my Vacheron 6405 restoration.
I just need to 2 minor parts and I was wondering if any members here could point me in the right direction:-

1) A replacement crown
2) A genuine Vacheron buckle

Is there any way I can purchase these 2 items without the need for Vacheron to service the watch - I just had the watch serviced by my independant watchmaker and I don't want to be shafted by the agency. In the past I have known a friend to require a $20- part for his JLC. Richemont insisted the watch was service at about US$1100- ....OUCH!

I took my Vacheron to the park today to work on a better photo to summaries my feelings for the watch. I always love a great photo.... to look at when the watch is in the bank safe.

I am fairly certain you cannot get a period-correct buckle from Vacheron. As far as I know, they don't have any more. They will happily sell you a new-style one, but it will look silly. You'll probably have to watch and wait, primarily on eBay; correct buckles do come up. Depending on how fussy you are, you might want to be aware that Patek, Audemars and Vacheron all seem to have used the same buckle supplier during the relevant period, so if you find a buckle that is correct for Patek or Audemars it will be correct for yours as well, with the exception of some very tiny lettering on the back.
Believe it or not, that was the easy part. I think you will have a very hard time buying a crown in the secondary market. There are too many different sizes and shapes. Since I am fairly sure Vacheron's crowns did not have any insignia during the relevant period, your best bet may well be to get a high-quality gold crown that fits well and leave it at that.